Single battery, battery pack and electric device

Abstract

The application discloses a single battery, a battery pack and an electric device, and belongs to the battery field. The single battery has a first direction and a second direction perpendicular to each other, and comprises a shell, a battery cell, an insulating piece and a support. The battery cell is located in the interior of the shell, and has two opposite end faces along the first direction. The battery cell has two opposite side faces along the second direction, and the insulating piece at at least one of the two side faces is provided with the support. The support is located on the surface of the insulating piece away from the side face, and a first gap is formed between the support and the inner wall of the shell. The insulating piece provided with the support at the two side faces is provided with a plurality of exhaust holes, and the exhaust holes are communicated with the first gap. In the embodiment of the application, the safety and performance of the single battery can be improved by arranging the support.

Description

Technical Field

[0001] This application belongs to the field of batteries, specifically relating to a single cell, a battery pack, and an electrical device. Background Technology

[0002] With the development of technology, vehicles have become a common means of transportation for people's daily travel. Typically, a battery pack is installed in a vehicle to provide power, resulting in better acceleration performance during initial acceleration. A battery pack usually contains multiple individual cells, each with a casing and a battery cell housed within it. During battery pack operation, the battery cells produce gas, which needs to be expelled from the casing promptly. However, in related technologies, the first side of the individual battery casing has terminals, and the second side has an explosion-proof valve. This arrangement may lead to problems with poor venting, thus affecting the safety and performance of the individual battery. Utility Model Content

[0003] The purpose of this application is to provide a single battery cell, a battery pack, and an electrical device, at least to solve the problem of poor venting in a single battery cell, which affects the safety and performance of the single battery cell.

[0004] In a first aspect, embodiments of this application provide a single-cell battery, the single-cell battery having intersecting first and second directions, the single-cell battery comprising: a casing, a cell, an insulating component, and a supporting component; The battery cell is located inside the housing, and the battery cell has two opposing end faces along a first direction. The insulating member covers the surface of the battery cell except for one of the end faces. The battery cell has two opposing sides along the second direction, and the support member is provided on the insulating member at at least one of the two sides. The support member is located on the surface of the insulating member opposite to the side, and a first gap is formed between the support member and the inner wall of the outer casing. The insulating member on which the support is located on both sides is provided with a plurality of vent holes, and the vent holes are connected to the first gap.

[0005] Optionally, the support member is a sheet-like structure, the support member is connected to the surface of the insulating member opposite to the side, and the support member is provided with a through hole, the through hole penetrates the support member along the second direction, the through hole communicates with the exhaust hole, and the through hole communicates with the first gap, so that the exhaust hole communicates with the first gap.

[0006] Optionally, along the second direction, there is a gap between the support member and the insulating member, the vent hole communicates with the gap, and the through hole communicates with the gap.

[0007] Optionally, the vent hole and the through hole are misaligned in the second direction.

[0008] Optionally, the support member is provided with a first positioning hole, and the insulating member is provided with a second positioning hole, with the first positioning hole and the second positioning hole positioned opposite each other along the second direction.

[0009] Optionally, the projection of the support member on the surface of the insulator opposite to the side is located inside the projection of the side on the surface of the insulator opposite to the side.

[0010] Optionally, the single cell also has a third direction perpendicular to both the first direction and the second direction, the number of the support members is multiple, and the support members are strip-shaped, the support members extend along the first direction, and the support members on the insulating member at the side are distributed at intervals along the third direction.

[0011] Optionally, there are multiple support members, and the multiple support members are arranged in an array on the insulating member on the side.

[0012] Optionally, the single cell also has a third direction perpendicular to both the first direction and the second direction, and the insulating member includes a first sub-insulating member and a second sub-insulating member, the first sub-insulating member and the second sub-insulating member together cover the cell, and the first sub-insulating member and the second sub-insulating member at least partially overlap at the side. The support member includes a first sub-support member and a second sub-support member. The first sub-support member is connected to the surface of the first sub-insulator member away from the battery cell, and the second sub-support member is connected to the surface of the second sub-insulator member away from the battery cell. The first sub-support member and the second sub-support member are distributed at intervals along the third direction, and the overlapping position of the first sub-insulator member and the second sub-insulator member is located between the first sub-support member and the second sub-support member.

[0013] Optionally, the insulating element includes a first sub-insulating element and a second sub-insulating element, the first sub-insulating element and the second sub-insulating element together cover the battery cell, and the first sub-insulating element and the second sub-insulating element are at least partially stacked on the side and have a second gap; The support member includes a first sub-support member and a second sub-support member. The first sub-support member is connected to the surface of the first sub-insulator member away from the battery cell, and the second sub-support member is connected to the surface of the second sub-insulator member away from the battery cell. The first sub-support member and the second sub-support member are spaced apart along a third direction and are located in the second gap between the first sub-insulator member and the second sub-insulator member.

[0014] Optionally, the end face of the insulating member corresponding to the first direction has the exhaust hole.

[0015] Secondly, embodiments of this application provide a battery pack, the battery pack comprising the single cell described in any one of the first aspects above.

[0016] Thirdly, embodiments of this application provide an electrical device, which includes the battery pack described in the second aspect above.

[0017] In this embodiment, since the battery cell has two opposing end faces along the first direction, and the insulating member covers the surface of the battery cell except for one end face, it is equivalent to one end face of the battery cell not being covered by the insulating member. A tab can be connected to this end face, allowing the battery cell to connect to the terminal of the single-cell battery through the tab, thus enabling the single-cell battery to discharge externally. Additionally, the battery cell has two opposing side faces along the second direction. A support member is provided on the insulating member at at least one of the two side faces, and the support member is located on the surface of the insulating member facing away from the side face. A first gap exists between the support member and the inner wall of the outer casing. Therefore, the presence of the support member is equivalent to supporting the insulating member on the side face and the inner wall of the outer casing, creating a first gap between the side face of the battery cell and the inner wall of the outer casing. This allows gas in the outer casing to flow along the first gap and be discharged to the outside of the outer casing. Furthermore, the presence of the support member ensures that the first gap always exists, effectively ensuring that gas in the outer casing can always flow along the first gap and be discharged. In addition, the insulating component with support members on both sides has multiple vent holes, which are connected to the first gap. This allows gas generated in the cell to flow through the vent holes to the first gap, and then continue flowing through the gap until it exits the individual battery cell. In other words, in this embodiment, by providing support members on the insulating component on the side of the cell, the support members provide support, ensuring that a first gap always exists between the side of the cell and the inner wall of the casing, and also between the support member and the inner wall of the casing. This allows gas generated in the cell to flow through the vent holes of the insulating component into the first gap, ensuring that the gas always flows along the first gap. This prevents obstruction of gas flow within the casing, which could lead to poor gas venting and affect the safety and performance of the individual battery cell. Therefore, in this embodiment, by providing support members, the safety and performance of the individual battery cell can be improved. Attached Figure Description

[0018] Figure 1 This is a schematic diagram illustrating one of the single-cell batteries provided in an embodiment of this application; Figure 2 This is a second schematic diagram illustrating a single-cell battery provided in an embodiment of this application; Figure 3 This diagram shows an exploded view of a single-cell battery provided in an embodiment of this application. Figure 4 This is a schematic diagram illustrating an insulating component provided in an embodiment of this application, which is unfolded and connected to a support component; Figure 5 This represents one of the cross-sectional views of a single-cell battery provided in an embodiment of this application; Figure 6 express Figure 5 A magnified view of a section at point A in the middle; Figure 7 This is one of the schematic diagrams illustrating an embodiment of an insulating component with a sheet-like support member disposed thereon. Figure 8 This is a second schematic diagram illustrating an insulating component with a sheet-like support member provided in an embodiment of this application. Figure 9 This is a schematic diagram illustrating an embodiment of the present application where an insulating component is unfolded and a strip-shaped support is provided; Figure 10 This is a schematic diagram illustrating a support member provided in an embodiment of this application, in which an insulating component is unfolded and arranged in an array. Figure 11 This is a second cross-sectional view of a single-cell battery provided in an embodiment of this application; Figure 12 express Figure 11 A magnified view of a section at point B in the middle; Figure 13 This is one of the schematic diagrams illustrating a first sub-support member and a second sub-support member located outside the overlapping position of the first sub-insulator member and the second sub-insulator member, according to an embodiment of this application. Figure 14 This is a second schematic diagram illustrating that, according to an embodiment of this application, a first sub-support member and a second sub-support member are located outside the overlapping position of a first sub-insulator member and a second sub-insulator member; Figure 15 This is a schematic diagram illustrating the unfolding of a first sub-insulator and its connection to a first sub-support member according to an embodiment of this application. Figure 16 This is a third cross-sectional view of a single-cell battery provided in an embodiment of this application; Figure 17 express Figure 16 A magnified view of a section at point C; Figure 18 This is a schematic diagram showing the overlapping position of a first sub-insulator and a second sub-insulator according to an embodiment of this application; Figure 19 express Figure 18 A magnified view of a section at point D.

[0019] Figure label: 10: Outer shell; 11: Housing; 12: Top cover; 13: Bottom cover; 20: Battery cell; 201: End face; 202: Side face; 30: Insulator; 31: First sub-insulator; 32: Second sub-insulator; 301: Vent hole; 302: Second positioning hole; 40: Support; 41: First sub-support; 42: Second sub-support; 401: Through hole; 402: First positioning hole; X: First direction; Y: Second direction; Z: Third direction. Detailed Implementation

[0020] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, the single cell has a first direction X and a second direction Y that are perpendicular to each other. The single cell includes: a casing 10, a cell 20, an insulating component 30, and a supporting component 40.

[0024] The battery cell 20 is located inside the outer casing 10. The battery cell 20 has two opposing end faces 201 along the first direction X. The battery cell 20 has two opposing side faces 202 along the second direction Y. At least one of the two side faces 202 is provided with a support member 40 on the insulating member 30. The support member 40 is located on the surface of the insulating member 30 away from the side face 202. There is a first gap between the support member 40 and the inner wall of the outer casing 10. The insulating member 30 with the support member 40 at the two side faces 202 is provided with a plurality of vent holes 301. The vent holes 301 are connected to the first gap.

[0025] In this embodiment, the insulating member 30 covers the surface of the battery cell 20 except for one end face 201.

[0026] In this embodiment, since the cell 20 has two opposing end faces 201 along the first direction X, and the insulating member 30 covers the surface of the cell 20 except for one end face 201, it is equivalent to one end face 201 of the cell 20 not being covered by the insulating member 30. A tab can be connected to this end face 201, so that the cell 20 is connected to the terminal of the single battery through the tab, thereby achieving the effect of the single battery being able to discharge to the outside. In addition, the battery cell 20 has two opposing sides 202 along the second direction Y. At least one of the two sides 202 has an insulating member 30 with a support member 40. The support member 40 is located on the surface of the insulating member 30 away from the side 202. There is a first gap between the support member 40 and the inner wall of the outer casing 10. Therefore, the presence of the support member 40 is equivalent to supporting the insulating member 30 at the side 202 and the inner wall of the outer casing 10, so that there is a first gap between the side 202 of the battery cell 20 and the inner wall of the outer casing 10. This allows the gas in the outer casing 10 to flow along the first gap and be discharged to the outside of the outer casing 10. The presence of the support member 40 ensures that the first gap always exists, effectively ensuring that the gas in the outer casing 10 can always flow along the first gap and be discharged. In addition, the insulating member 30 with support members 40 at both sides 202 is provided with multiple vent holes 301. The vent holes 301 are connected to the first gap, so that once the cell 20 generates gas, the gas can flow through the vent holes 301 at the side 202 to the first gap, and then continue to flow through the first gap, eventually allowing the gas to flow out of the single cell. That is, in this embodiment, by providing support members 40 at the insulating member 30 at the side 202 of the cell 20, the support members 40 can play a supporting role, so that there is always a first gap between the side 202 of the cell 20 and the inner wall of the outer casing 10, and there is also a first gap between the support member 40 and the inner wall of the outer casing 10. This allows the gas generated by the cell 20 to flow through the vent holes 301 of the insulating member 30 to the first gap, ensuring that the gas always flows along the first gap, thereby avoiding the possibility of obstruction of gas flow in the outer casing 10, which would lead to poor gas venting in the outer casing 10 and affect the safety and performance of the single cell. In this embodiment of the application, by providing the support member 40, the safety and performance of the single battery cell can be improved.

[0027] In addition, in this embodiment of the application, by providing the support member 40, interference between the battery cell 20 and the inner wall of the outer casing 10 can be avoided, ensuring that the battery cell 20 is less interfered with in the outer casing 10.

[0028] It should be noted that, in the embodiments of this application, as Figure 2As shown, the outer casing 10 includes a housing 11, a top cover 12, and a bottom cover 13. Along the first direction X, the outer casing 10 has two opposing openings. The top cover 12 closes to one opening, and the bottom cover 13 closes to the other opening, thereby forming a closed space enclosed by the housing 11, the top cover 12, and the bottom cover 13, in which the battery cell 20 is located. The top cover 12 may be provided with a terminal post, and the end face 201 of the battery cell 20, which is not covered by the insulating member 30, is provided with a tab. The tab and the terminal post are connected by a connecting piece. The bottom cover 13 may be provided with a vent or an explosion-proof valve, allowing gas inside the outer casing 10 to be discharged to the outside of the outer casing 10 through the vent or the explosion-proof valve. In addition, the insulating member 30 at the side 202 of the battery cell 20 is provided with a support member 40. The support member 40 makes a first gap between the side 202 of the battery cell 20 and the inner wall of the outer casing 10. The first gap can communicate with a vent or an explosion-proof valve, so that the gas inside the outer casing 10 flows through the first gap to the vent or explosion-proof valve and is discharged to the outside of the outer casing 10.

[0029] Furthermore, in this embodiment, the support member 40 may be provided on the insulating member 30 at only one side 202 of the battery cell 20, or the support member 40 may be provided on the insulating member 30 at both sides 202. This embodiment does not limit the scope of the application in this regard.

[0030] Furthermore, in this embodiment, when the gas in the casing 10 flows in the first gap between the side 202 of the cell 20 and the casing 10, the gas flows in the first direction X. When the gas in the casing 10 flows in the first gap between the support 40 and the inner wall of the casing 10, the gas flows in the first direction X.

[0031] Furthermore, in this embodiment, the number of vent holes 301 on the insulating member 30 can be set according to actual needs. For example, the number of vent holes 301 on the insulating member 30 may be 50, or even 60. The specific number of vent holes 301 is not limited in this embodiment.

[0032] Additionally, in some embodiments, such as Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the support member 40 is a sheet structure. The support member 40 is connected to the surface of the insulating member 30 away from the side 202. The support member 40 is provided with a through hole 401. The through hole 401 penetrates the support member 40 along the second direction Y. The through hole 401 is connected to the exhaust hole 301 and the first gap, so that the exhaust hole 301 is connected to the first gap.

[0033] Because of its sheet-like structure and the through hole 401 on the support member 40, which is connected to the vent hole 301, once gas is generated in the cell 20, the gas flows to the vent hole 301 of the insulating member 30. This is equivalent to the gas generated in the cell 20 being discharged to the outside of the cell 20 through the vent hole 301 of the insulating member 30. The through hole 401 is connected to the vent hole 301, allowing the gas generated in the cell 20 to flow to the through hole 401. In addition, the through hole 401 is connected to the first gap, that is, the through hole 401 is connected to the first gap between the support member 40 and the inner wall of the outer casing 10. Thus, once the gas flows to the through hole 401, the gas can flow into the first gap, where it flows and is eventually discharged to the outside of the single battery cell. That is, by setting the support member 40 as a sheet structure and providing the support member 40 with a through hole 401, the gas generated by the single cell can be easily discharged to the outside of the single cell through the first gap between the support member 40 and the inner wall of the outer casing 10.

[0034] It should be noted that the end of the support member 40 can be connected to the surface of the insulating member 30 opposite to the side 202, that is, the end of the support member 40 and the insulating member 30 are connected by a hot melt process.

[0035] Furthermore, the number of through holes 401 can be set according to actual needs. For example, the number of through holes 401 can be 15, or for another example, the number of through holes 401 can be 20. The specific number of through holes 401 is not limited in this embodiment.

[0036] In some embodiments, a gap exists between the support member 40 and the insulator 30 along the second direction Y, with the vent 301 communicating with the gap and the through hole 401 communicating with the gap. With this arrangement, once gas is generated in the cell 20, the gas flows through the vent 301 on the insulator 30 to the gap between the support member 40 and the insulator 30, then flows through this gap to the through hole 401, and finally through the through hole 401 to the first gap between the support member 40 and the inner wall of the outer casing 10, thereby allowing the gas to be discharged to the outside of the individual battery cell. In other words, by creating a first gap between the support member 40 and the insulator 30, it is convenient for the gas generated by the cell 20 to flow to the outside of the individual battery cell.

[0037] It should be noted that when the ends of the support member 40 are connected to the insulating member 30 by a hot-melt process, there may be a gap between the middle part of the support member 40 and the insulating member 30, that is, the middle part of the support member 40 does not contact the insulating member 30. The middle part of the support member 40 refers to the portion of the support member 40 excluding the ends, and the middle part is located between the ends of the support member 40.

[0038] In some embodiments, the vent 301 and the through hole 401 are misaligned in the second direction Y. With this arrangement, once the gas generated by the battery cell 20 flows out of the vent 301, the gas flows into the gap between the support member 40 and the insulator 30. The gas is then blocked by the surface of the support member 40 facing the insulator 30, causing a change in the subsequent flow direction of the gas exiting the battery cell 20. This allows the gas to flow in the gap along the first direction X and into the through hole 401, and then through the through hole 401 into the first gap between the support member 40 and the inner wall of the outer casing 10. In other words, by misaligning the vent 301 and the through hole 401 in the second direction Y, the high-velocity gas flowing out of the battery cell 20 is blocked by the support member 40, reducing its velocity and facilitating its flow through the through hole 401 into the first gap between the support member 40 and the inner wall of the outer casing 10.

[0039] Of course, in this embodiment, the exhaust port 301 and the through hole 401 may also be positioned opposite each other in the second direction Y.

[0040] Additionally, in some embodiments, such as Figure 7 As shown, the support member 40 is provided with a first positioning hole 402, and the insulating member 30 is provided with a second positioning hole 302. Along the second direction Y, the first positioning hole 402 and the second positioning hole 302 are positioned opposite each other.

[0041] By providing a first positioning hole 402 on the support member 40 and a second positioning hole 302 on the insulating member 30, the first positioning hole 402 on the support member 40 and the second positioning hole 302 on the insulating member 30 can be positioned opposite each other during installation of the support member 40. This ensures that the support member 40 is in the correct position and can then be connected to the insulating member 30. In other words, by providing a first positioning hole 402 on the support member 40 and a second positioning hole 302 on the insulating member 30, it is easier to install the support member 40 to the appropriate position, thus improving the installation efficiency of the support member 40.

[0042] It should be noted that the shape and number of the first positioning holes 402 can be set according to actual needs. For example, there can be two first positioning holes 402, and the shape of the first positioning holes 402 can be circular. Alternatively, there can be three first positioning holes 402, and the shape of the first positioning holes 402 can be square. This embodiment of the application does not limit this. Furthermore, the shape of the second positioning hole 302 can be the same as the shape of the first positioning hole 402, and the number of the second positioning hole 302 can be the same as the number of the first positioning hole 402.

[0043] In some embodiments, the projection of the support member 40 onto the surface of the insulator 30 opposite to the side 202 is located inside the projection of the side 202 onto the surface of the insulator 30 opposite to the side 202. This arrangement ensures that the support member 40 is supported on the side 202 of the battery, preventing the support member 40 from extending beyond the side 202 of the cell 20 and potentially interfering with the interior of the casing 10, thus avoiding difficulties in installing the support member 40 within the casing 10. In other words, by setting the projection of the support member 40 onto the surface of the insulator 30 opposite to the side 202 to be inside the projection of the side 202 onto the surface of the insulator 30 opposite to the side 202, it is easier to install the support member 40 and the cell 20 inside the casing 10.

[0044] Additionally, in some embodiments, such as Figure 9 As shown, the single cell also has a third direction Z perpendicular to both the first direction X and the second direction Y. There are multiple support members 40, and each support member 40 is strip-shaped, extending along the first direction X. The support members 40 on the insulating member 30 at the side 202 are spaced apart along the third direction Z. With this arrangement, adjacent support members 40 have a first gap. Thus, once gas is generated in the cell 20, the gas flows out from the vent hole 301 on the insulating member 30. This gas can flow into the first gap between adjacent insulating members 30, and also into the first gap between the support member 40 and the inner wall of the outer casing 10. This effectively increases the gas flow channels, facilitating gas discharge from the single cell. In other words, by making the support members 40 on the insulating member 30 at the side 202 spaced apart along the third direction Z, the first gap between adjacent insulating members 30 effectively forms a gas flow channel, and the first gap between the support member 40 and the inner wall of the outer casing 10 also serves as a gas flow channel, increasing the number of gas flow channels and facilitating gas flow to the outside of the single cell.

[0045] It should be noted that when the support member 40 is strip-shaped, the support member 40 and the insulating member 30 can be an integral structure.

[0046] Additionally, in some embodiments, such as Figure 10 As shown, there are multiple support members 40, which are arranged in an array on the insulating member 30 at the side 202. With this arrangement, there is a gap between two adjacent support members 40, and the first gap between the support member 40 and the inner wall of the outer casing 10 communicates with this gap, which is equivalent to increasing the channels for gas flow, which is conducive to the gas being discharged from the single cell.

[0047] It should be noted that the multiple support members 40 can be arranged in a square array on the insulating member 30, or they can be arranged in a rhomboid array on the insulating member 30. The form of the array formed by the multiple support members 40 is not limited in this embodiment.

[0048] In addition, when the support members 40 are arranged in an array, the support members 40 and the insulating members 30 can be an integral structure.

[0049] Additionally, in some embodiments, such as Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14 As shown, the single cell also has a third direction Z perpendicular to both the first direction X and the second direction Y. The insulating member 30 includes a first sub-insulator 31 and a second sub-insulator 32. The first sub-insulator 31 and the second sub-insulator 32 together cover the cell 20, and the first sub-insulator 31 and the second sub-insulator 32 at least partially overlap at the side 202. The support member 40 includes a first sub-support 41 and a second sub-support 42. The first sub-support 41 is connected to the surface of the first sub-insulator 31 facing away from the cell 20, and the second sub-support 42 is connected to the surface of the second sub-insulator 32 facing away from the cell 20. The first sub-support 41 and the second sub-support 42 are distributed at intervals along the third direction Z, and the overlapping position of the first sub-insulator 31 and the second sub-insulator 32 is located between the first sub-support 41 and the second sub-support 42.

[0050] Since the first sub-insulator 31 and the second sub-insulator 32 together cover the battery cell 20, and the first sub-insulator 31 and the second sub-insulator 32 at least partially overlap at the side 202, it is equivalent to forming a covering space by the two sub-insulators 30, and placing the battery cell 20 in this covering space to insulate the battery cell 20 from the inner wall of the outer casing 10. Furthermore, providing the first sub-insulator 31 and the second sub-insulator 32 also reduces the processing difficulty of each sub-insulator 30, facilitating the production of both the first sub-insulator 31 and the second sub-insulator 32. In addition, the first sub-support member 41 is connected to the surface of the first sub-insulator 31 facing away from the cell 20, and the second sub-support member 42 is connected to the surface of the second sub-insulator 32 facing away from the cell 20. The first sub-support member 41 and the second sub-support member 42 are distributed at intervals along the third direction Z, and the overlapping position of the first sub-insulator 31 and the second sub-insulator 32 is located between the first sub-support member 41 and the second sub-support member 42. Thus, the first sub-support member 41 and the second sub-support member 42 are located outside the overlapping position of the first sub-insulator 31 and the second sub-insulator 32, so that the first sub-support member 41 and the second sub-support member 42 can play a supporting role. Both the first sub-support member 41 and the second sub-support member 42 have a first gap with the inner wall of the outer casing 10, which facilitates the flow of gas generated by the cell 20 to the outside of the single cell.

[0051] It should be noted that, in the embodiments of this application, the third direction Z can intersect with both the first direction X and the second direction Y simultaneously.

[0052] Additionally, in some embodiments, such as Figure 15 , Figure 16 , Figure 17 , Figure 18 and Figure 19 As shown, the insulating member 30 includes a first sub-insulator 31 and a second sub-insulator 32, which together cover the battery cell 20. The first sub-insulator 31 and the second sub-insulator 32 are at least partially stacked at the side 202 and have a second gap. The supporting member 40 includes a first sub-support 41 and a second sub-support 42. The first sub-support 41 is connected to the surface of the first sub-insulator 31 facing away from the battery cell 20, and the second sub-support 42 is connected to the surface of the second sub-insulator 32 facing away from the battery cell 20. The first sub-support 41 and the second sub-support 42 are distributed at intervals along the third direction Z. The first sub-support 41 is connected to the first sub-support 41, and the second sub-support 42 is connected to the second sub-support 42. The first sub-support 41 and the second sub-support 42 are located in the second gap between the first sub-insulator 31 and the second sub-insulator 32.

[0053] Since the first sub-insulator 31 and the second sub-insulator 32 together cover the battery cell 20, and the first sub-insulator 31 and the second sub-insulator 32 are at least partially stacked at the side 202 and have a second gap, it is equivalent to forming a covering space by the two sub-insulators 30, and placing the battery cell 20 in the covering space to insulate the battery cell 20 from the inner wall of the outer casing 10. Furthermore, the provision of the first sub-insulator 31 and the second sub-insulator 32 also reduces the processing difficulty of each sub-insulator 30, facilitating the production of the first sub-insulator 31 and the second sub-insulator 32.

[0054] In addition, the first sub-support 41 is connected to the surface of the first sub-insulator 31 facing away from the cell 20, and the second sub-support 42 is connected to the surface of the second sub-insulator 32 facing away from the cell 20. The first sub-support 41 and the second sub-support 42 are distributed at intervals along the third direction Z. Therefore, the first sub-support 41 and the second sub-support 42 can be located in the second gap between the first sub-insulator 31 and the second sub-insulator 32. The first sub-support 41 and the second sub-support 42 can support the stacked position of the first sub-insulator 31 and the second sub-insulator 32, so that the second gap between the first sub-insulator 31 and the second sub-insulator 32 at the stacked position always exists, thereby facilitating the flow of gas generated by the cell 20 to the outside of the single cell through the second gap.

[0055] It should be noted that when the first sub-support member 41 and the second sub-support member 42 are located in the second gap between the first sub-insulator member 31 and the second sub-insulator member 32, the first sub-insulator member 31 or the second sub-insulator member 32 are present between the first sub-support member 41 and the inner wall of the outer shell 10, and between the second sub-support member 42 and the inner wall of the outer shell 10. This is equivalent to the first gap between the first sub-support member 41 and the second sub-support member 42 and the inner wall of the outer shell 10, and the first sub-insulator member 31 or the second sub-insulator member 32 is accommodated in the first gap.

[0056] In addition, when the insulating member 30 includes a first sub-insulating member 31 and a second sub-insulating member 32, both the first sub-insulating member 31 and the second sub-insulating member 32 include four surfaces, that is, the first sub-insulating member 31 is formed by four surfaces, and the second sub-insulating member 32 is also formed by four surfaces.

[0057] Additionally, in some embodiments, such as Figure 7As shown, the end face 201 has an exhaust port 301 on the insulating member 30 corresponding to the first direction X. With this arrangement, once gas is generated in the battery cell 20, the gas can also flow out through the exhaust port 301 on the insulating member 30 corresponding to the end face 201 in the first direction X. This effectively increases the channel for the gas generated in the battery cell 20 to escape, helping the gas generated in the battery cell 20 to quickly flow to the outside of the battery cell 20. In other words, by providing an exhaust port 301 on the insulating member 30 corresponding to the end face 201 in the first direction X, it is convenient for the gas generated in the battery cell 20 to be discharged to the outside of the battery cell 20.

[0058] It should be noted that the number of vent holes 301 on the insulating member 30 corresponding to the end face 201 can be set according to actual needs. For example, the number of vent holes 301 may be 40, or even 60. This embodiment of the application does not limit this.

[0059] This application provides a battery pack that includes individual batteries from any of the above embodiments.

[0060] This application provides an electrical device that includes the battery pack described in the above embodiments.

[0061] It should be noted that, in the embodiments of this application, the electrical equipment can be a vehicle, and the types of vehicles include, but are not limited to, range-extended vehicles, plug-in hybrid vehicles, and pure electric vehicles.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A single-cell battery, characterized in that, The single battery cell has a first direction and a second direction that are perpendicular to each other, and the single battery cell includes: a shell, a cell, an insulating component, and a supporting component; The battery cell is located inside the outer casing, and the battery cell has two opposing end faces along a first direction; The battery cell has two opposing sides along the second direction, and the support member is provided on the insulating member at at least one of the two sides. The support member is located on the surface of the insulating member opposite to the side, and a first gap is formed between the support member and the inner wall of the outer casing. The insulating member on which the support is located on both sides is provided with a plurality of vent holes, and the vent holes are connected to the first gap.

2. The single-cell battery according to claim 1, characterized in that, The support member is a sheet-like structure. The support member is connected to the surface of the insulating member away from the side. The support member is provided with a through hole. The through hole penetrates the support member along the second direction. The through hole communicates with the exhaust hole and the first gap, so that the exhaust hole communicates with the first gap.

3. The single-cell battery according to claim 2, characterized in that, Along the second direction, there is a gap between the support member and the insulating member, the vent hole communicates with the gap, and the through hole communicates with the gap.

4. The single-cell battery according to claim 3, characterized in that, The vent hole and the through hole are misaligned in the second direction.

5. The single-cell battery according to claim 2, characterized in that, The support member is provided with a first positioning hole, and the insulating member is provided with a second positioning hole. Along the second direction, the first positioning hole and the second positioning hole are positioned opposite each other.

6. The single-cell battery according to claim 2, characterized in that, The projection of the support member on the surface of the insulator opposite to the side is located inside the projection of the side on the surface of the insulator opposite to the side.

7. The single-cell battery according to claim 1, characterized in that, The single cell also has a third direction perpendicular to both the first direction and the second direction. There are multiple support members, and each support member is strip-shaped. The support members extend along the first direction, and the support members on the insulating member at the side are spaced apart along the third direction.

8. The single-cell battery according to claim 1, characterized in that, The number of the support members is multiple, and the multiple support members are arranged in an array on the insulating member on the side.

9. The single-cell battery according to claim 1, characterized in that, The single cell also has a third direction that is perpendicular to both the first direction and the second direction. The insulating member includes a first sub-insulating member and a second sub-insulating member. The first sub-insulating member and the second sub-insulating member together cover the cell, and the first sub-insulating member and the second sub-insulating member at least partially overlap at the side. The support member includes a first sub-support member and a second sub-support member. The first sub-support member is connected to the surface of the first sub-insulator member away from the battery cell, and the second sub-support member is connected to the surface of the second sub-insulator member away from the battery cell. The first sub-support member and the second sub-support member are distributed at intervals along the third direction, and the overlapping position of the first sub-insulator member and the second sub-insulator member is located between the first sub-support member and the second sub-support member.

10. The single-cell battery according to claim 1, characterized in that, The insulating component includes a first sub-insulating component and a second sub-insulating component, the first sub-insulating component and the second sub-insulating component together cover the battery cell, and the first sub-insulating component and the second sub-insulating component are at least partially stacked on the side and have a second gap; The support member includes a first sub-support member and a second sub-support member. The first sub-support member is connected to the surface of the first sub-insulator member away from the battery cell, and the second sub-support member is connected to the surface of the second sub-insulator member away from the battery cell. The first sub-support member and the second sub-support member are spaced apart along a third direction and are located in the second gap between the first sub-insulator member and the second sub-insulator member.

11. The single-cell battery according to claim 1, characterized in that, The end face of the insulating member corresponding to the first direction has the exhaust hole.

12. A battery pack, characterized in that, The battery pack comprises any one of the individual cells according to claims 1-11.

13. An electrical appliance, characterized in that, The electrical equipment includes the battery pack as described in claim 12.

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